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Plus Two Physics

If gravitation suddenly stops?!

If gravitation suddenly stops …… neglecting the rotation … if someone is standing on ground ….. will the normal reaction disappear?? If yes why? I want to know when does normal reaction acts on a body? and in the absence of weight why would it disappear? (Ahwan Abhinandan Joshi asks)

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Plus Two Physics

Kinetic Energy – Numerical Problem

a running man has half the kinetic energy that a boy of half his mass has.the man speed up by 1m/s and then has the same kinetic energy as the body. what were the original speeds of man and boy?

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Plus Two Physics

What is Eddy Current?

Eddy currents are circulating currents induced in the body of a solid conductor whenever the magnetic flux linked with it changes. It is called EDDY CURRENT because they are like eddies formed in water. Also read http://askphysics.com/ask-physics/eddy-currents-applications/

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Plus Two Physics

Class XI CBSE – Revision Questions MCQ – Semester 1

What is the gravitational field strength of a planet when the weight of a 100 kg astronaut is 400 N? a)      ¼ N kg-1   b) 9.8 N kg-1 c) 4 N kg-1  d) infinity   The only natural satellite of the earth complete orbits in about a)      24 days b) 27.3 days c) 30 days […]

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Ask Physics Neglecting Project vertical acceleration vertical velocity

Horizontal projectile and freely falling body

A rifle at a height H aimed horizontally fires a bullet to the ground. At the same time , a bullet with the same mass in dropped from the same height. Neglecting air resistance, which one hits the ground first?Explain.
ED posted
Answer:
Both will hit t…

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Ask Physics caption escape velocity Project relativistic travel Relativity time dilation TWIN twin paradox

What is twin paradox?

TWIN PARADOX is a paradoxical situation coming in while explaining the theory of relativity. “Time dilation” is one of the important consequences of relativity. It says that if a body is moving with relativistic speeds, time will dialate …

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Ask Physics first body Project SOUNDARYA t2 tower

A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s.When and where they will meet?

A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s. When and where they will meet?
SOUNDARYA asked
 Answer:
For the first body,
u=0 m/s
Let S=x (from top)
x=0.5 gt2  &#…